Ceiling fan



FIG. 1 is a top view of a ceiling fan showing my new design;

FIG. 2 is a bottom view of the thereof;

FIG. 3 is a front view of the thereof;

FIG. 4 is a right side view of the thereof;

FIG. 5 is a left side view of the thereof; and,

FIG. 6 is a rear view of the thereof.

The broken line showing of environmental structure in FIGS. 1-6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a ceiling fan, as shown and described. 